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WO2019198919A1 - Bloc-batterie comportant un boîtier de bloc - Google Patents

Bloc-batterie comportant un boîtier de bloc Download PDF

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Publication number
WO2019198919A1
WO2019198919A1 PCT/KR2019/001110 KR2019001110W WO2019198919A1 WO 2019198919 A1 WO2019198919 A1 WO 2019198919A1 KR 2019001110 W KR2019001110 W KR 2019001110W WO 2019198919 A1 WO2019198919 A1 WO 2019198919A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
case
edge portion
battery pack
pack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2019/001110
Other languages
English (en)
Korean (ko)
Inventor
박창욱
양근주
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Chem Ltd
Original Assignee
LG Chem Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to CN201980004861.8A priority Critical patent/CN111183532B/zh
Priority to ES19786077T priority patent/ES2999532T3/es
Priority to JP2020515254A priority patent/JP7046167B2/ja
Priority to EP19786077.8A priority patent/EP3686955B1/fr
Priority to US16/646,820 priority patent/US11152662B2/en
Publication of WO2019198919A1 publication Critical patent/WO2019198919A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/227—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/358—External gas exhaust passages located on the battery cover or case
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/383—Flame arresting or ignition-preventing means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery pack including a pack housing, and more particularly, to a battery pack capable of preventing ignition or explosion of a battery cell by providing a pack housing having a negative pressure therein.
  • водородн ⁇ е ⁇ е ⁇ ество Commercially available secondary batteries include nickel cadmium batteries, nickel hydride batteries, nickel zinc batteries, and lithium secondary batteries. Among them, lithium secondary batteries have almost no memory effect compared to nickel-based secondary batteries, and thus are free of charge and discharge. The self-discharge rate is very low and the energy density is high.
  • Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as positive electrode active materials and negative electrode active materials, respectively.
  • the lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate coated with such a positive electrode active material and a negative electrode active material are disposed with a separator interposed therebetween, and a packaging material for sealing and accommodating the electrode assembly together with an electrolyte, that is, a battery pouch packaging material.
  • a lithium secondary battery may be classified into a can type secondary battery in which an electrode assembly is embedded in a metal can and a pouch type secondary battery in which an electrode assembly is embedded in a pouch of an aluminum laminate sheet, depending on the shape of the exterior material.
  • lithium secondary batteries have been widely used not only for small devices such as portable electronic devices, but also for medium and large devices such as automobiles and power storage devices. When used in such medium and large devices, a large number of lithium secondary batteries are electrically connected to increase capacity and output.
  • the pouch-type lithium secondary battery is widely used in such a medium-large size device because of its easy lamination.
  • a battery pack when a battery pack is configured by electrically connecting a plurality of lithium secondary batteries, a battery module including a plurality of lithium secondary batteries is first configured, and such battery modules are mounted in a pack housing together with electrical components. It is generally known to manufacture battery packs.
  • lithium secondary batteries have an explosion risk when overheated, and it is one of important issues to ensure safety.
  • the overheating of such a lithium secondary battery is caused by various causes, and one of them is a case where an overcurrent exceeding a limit flows through the lithium secondary battery.
  • the lithium secondary battery As the overcurrent flows, the lithium secondary battery generates heat by Joule heat, so the internal temperature of the battery increases rapidly. The rapid rise in temperature also causes decomposition reactions of the electrolyte, causing thermal runaway, which eventually leads to battery explosion.
  • the battery pack provided with many lithium secondary batteries has a very high risk. That is, the chain ignition or explosion of adjacent lithium secondary batteries may occur only by igniting one lithium secondary battery among a plurality of lithium secondary batteries in the battery pack, which may be a big problem of safety.
  • an object of the present invention is to provide a battery pack capable of preventing ignition or explosion of a battery cell by providing a pack housing having an inside of a negative pressure state.
  • At least one battery module having a plurality of battery cells and a module case in which an accommodation space is formed to accommodate the plurality of battery cells therein;
  • An inner structure is formed to cover the upper portion of the battery module, an upper case having a cover portion formed with an outer structure having a curved surface as a whole from one end to the other end, and an inner structure is formed to surround the lower portion of the battery module, It has a lower case having a mounting portion formed with an outer structure having a curved surface as a whole from one end to the other end, wherein the upper case and the lower case are coupled to each other so that the inside can maintain a negative pressure state to include a sealed pack housing Can be.
  • the upper case may include a first edge formed along the bottom surface of the cover and protrude outwardly, and the lower case may be formed along the top surface of the mount and protrude outward. 2 edges may be provided.
  • first edge portion and the second edge portion may be coupled to each other so that the inside of the pack housing can maintain a negative pressure state.
  • the upper case is formed to protrude and extend from an outer surface of the outer structure of the upper case, one side of the horizontal direction is connected to the outer surface of the cover portion, and a lower end is connected to the upper surface of the portion protruding outwardly of the first edge portion.
  • Ribs may be formed.
  • the lower case is formed to protrude from the outer surface of the outer structure of the lower case, one side of the horizontal direction is connected to the outer surface of the mounting portion and the upper end is connected to the lower surface of the portion protruding in the outward direction of the second rim portion Ribs may be formed.
  • a fastener configured to fasten bolts is formed in the upper case, a through hole configured to insert a bolt in the module case is formed, and a fastening groove is formed in a position corresponding to the fastener in the lower case in the lower case.
  • the battery pack may include at least one long bolt configured to allow the upper case, the battery module, and the lower case to be fixedly coupled to each other.
  • the pack housing may further include a gasket interposed between the first edge portion of the upper case and the second edge portion of the lower case.
  • each of the first edge portion and the second edge portion may be formed with an insertion groove into which a portion of the gasket is inserted.
  • the pack housing may be formed with a vent hole which is connected to the suction hose of the vacuum pump or closed by a cap so as to prevent inflow of external air.
  • the device according to the present invention for achieving the above object may include the battery pack.
  • the energy storage system according to the present invention for achieving the above object may include the device.
  • the battery module of the present invention includes an upper case and a lower case each having a cover portion and a mounting portion provided with a curved surface as a whole in the outer structure, the interior of the sealed pack housing is In the negative pressure state, deformation of the pack housing due to the negative pressure can be effectively prevented.
  • the battery module can be stably fixed in the pack housing.
  • the support part of the upper case and the support part of the lower case support the plurality of battery modules with a plurality of battery modules interposed therebetween, thereby preventing deformation of the pack housing and improving durability of the battery pack.
  • the pack housing may suppress the swelling phenomenon due to the charging and discharging of the battery module by pressing the plurality of battery modules inwardly through the support part.
  • the battery pack of the present invention by at least one long bolt configured to be fixed to each other, thereby binding the upper case and the lower case
  • the battery pack of the present invention by at least one long bolt configured to be fixed to each other, thereby binding the upper case and the lower case
  • a rib for rigid reinforcement in each of the upper case and the lower case, it is possible to supplement the rigidity of the weak part of the mechanical rigidity of the pack housing, it is possible to effectively improve the durability of the product have.
  • the gasket can be effectively prevented from being detached from the pack housing, or bottled or damaged.
  • the inside of the pack housing in the air discharged state by the vacuum pump, the inside of the pack housing can be maintained in the anaerobic state less oxygen than the outside, the battery module It is possible to prevent ignition or explosion due to abnormal operation of the battery cells built in.
  • FIG. 1 is a perspective view schematically showing a battery pack according to an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view schematically illustrating a battery pack according to an exemplary embodiment of the present invention.
  • FIG. 3 is a perspective view schematically illustrating battery modules and electrical components of a battery pack according to an exemplary embodiment of the present invention.
  • FIG. 4 is a perspective view schematically illustrating a battery cell of a battery pack according to an exemplary embodiment of the present invention.
  • FIG. 5 is a plan view schematically illustrating an upper case of a battery pack according to an exemplary embodiment of the present invention.
  • FIG. 6 is a bottom view schematically illustrating an upper case of a battery pack according to an exemplary embodiment of the present invention.
  • FIG. 7 is a bottom view schematically illustrating a lower case of a battery pack according to an exemplary embodiment of the present invention.
  • FIG. 8 is a plan view schematically illustrating a lower case of a battery pack according to an exemplary embodiment of the present invention.
  • FIG. 9 is a side cross-sectional view schematically illustrating a state cut along the line BB ′ of FIG. 1.
  • FIG. 10 is a partial side cross-sectional view schematically showing a region portion of C ′ in FIG. 9.
  • FIG. 11 is a partial side cross-sectional view schematically showing a region part of D ′ in FIG. 9.
  • FIG. 12 is a partial side cross-sectional view schematically showing a part of a battery pack according to another embodiment of the present invention.
  • FIG. 13 is a partially enlarged view schematically illustrating a portion of an area A ′ of FIG. 1.
  • FIG. 14 is a rear perspective view schematically illustrating a battery pack according to an embodiment of the present invention.
  • FIG. 15 is a side cross-sectional view schematically illustrating a state cut along the line CC ′ of FIG. 14.
  • FIG. 1 is a perspective view schematically showing a battery pack according to an embodiment of the present invention.
  • 2 is an exploded perspective view schematically illustrating a battery pack according to an exemplary embodiment of the present invention.
  • 3 is a perspective view schematically illustrating battery modules and electrical components of a battery pack according to an exemplary embodiment of the present invention.
  • 4 is a perspective view schematically illustrating a battery cell of a battery pack according to an exemplary embodiment of the present invention. 3 illustrates a battery cell mounted in battery modules for convenience of description.
  • the battery pack 200 of the present invention may include at least one battery module 100.
  • the battery module 100 may include a plurality of battery cells 110.
  • the battery cell 110 may be, for example, a cylindrical battery cell 110.
  • the battery cell 110 is not limited to the cylindrical battery cell 110, but other types, for example, a pouch type battery cell 110 or a metal square cell 110 may be applied.
  • the cylindrical battery cell 110 may include a cylindrical can 115 and an electrode assembly (not shown) accommodated inside the cylindrical can 115.
  • the cylindrical can 115 may include a material having high electrical conductivity.
  • the cylindrical can 115 may include aluminum or copper.
  • the cylindrical can 115 may be configured in a form standing long in the vertical direction.
  • the cylindrical can 115 may be a cylindrical extending in the vertical direction.
  • electrode terminals 111 and 112 may be formed at upper and lower portions of the cylindrical can 115, respectively.
  • a first electrode terminal 111 may be formed on a flat circular upper surface of the upper end of the cylindrical can 115, and a second electrode terminal 112 may be formed on a lower surface of the flat circular bottom of the cylindrical can 115. ) May be formed.
  • the first electrode terminal 111 may be a positive electrode terminal
  • the second electrode terminal may be a negative terminal 112.
  • cylindrical battery cells 110 may be arranged in a plurality of columns and rows in a horizontal direction.
  • the horizontal direction may mean a direction parallel to the ground when the cylindrical battery cell 110 is placed on the ground, and may also be referred to as at least one direction on a plane perpendicular to the vertical direction.
  • the electrode assembly (not shown) may be formed in a structure wound in a jelly-roll type with a separator interposed between the positive electrode and the negative electrode.
  • a positive electrode tab may be attached to the positive electrode (not shown) to be connected to the first electrode terminal 111 of the upper end of the cylindrical can 115.
  • a negative electrode tab may be attached to the negative electrode (not shown) to be connected to the second electrode terminal 112 at the bottom of the cylindrical can 115.
  • the module case 120 the accommodating space for accommodating the cylindrical battery cell 110 can be formed therein.
  • the accommodation space 123 may have a plurality of hollow structures formed to cover the outer surface of the cylindrical battery cell 110.
  • module case 120 may include an upper frame 120A and a lower frame 120B.
  • the upper frame 120A may include a first protruding fastening portion 122a
  • the lower frame 120B may include a second protruding fastening portion 122b.
  • the first protruding fastening portion 122a may protrude forward from the outer surface of the outer wall of the upper frame 120A.
  • the second protrusion coupling part 122b may be formed to protrude rearward from an outer surface of the outer wall of the lower frame 120B when viewed in the F direction.
  • terms indicating directions such as before, after, left, right, up, and down may vary depending on the position of the observer or the shape of the object. However, in the present specification, for convenience of description, the front, rear, left, right, up, down, and the like directions are shown separately based on a time when viewed in the F direction.
  • first protruding fastening part 122a and the second protruding fastening part 122b may be formed with a through hole 122h to insert a fastening bolt (not shown).
  • a fastening bolt (not shown).
  • the first protruding fastening portion 122a of the module case 120 may be connected to the second protruding fastening portion 122b of the other battery module 101 through a fastening bolt. Can be fastened and coupled.
  • the through hole 122h of the first protruding fastening part 122a is a through hole of the second protruding fastening part 122b of the lower frame 120B of the other battery module 100 so that the fastening bolt is continuously inserted. Communication with 122h. Accordingly, the one battery module 100 and the other battery module 101 may be coupled to each other by fastening the first protrusion fastening portion 122a and the second protrusion fastening portion 122b to each other using fastening bolts. 100, 101, 102 may be arranged.
  • the first protruding fastening portion 122a of the upper frame 120A is bolted with the second protruding fastening portion 122b of the lower frame 120B of the other battery module 100.
  • the arrangement of the battery modules 100, 101, and 102 may be prevented from being disturbed.
  • the battery module 100 may include a bus bar on one surface thereof so as to be electrically connected to the electrode terminals 111 and 112 of at least two cylindrical battery cells 110 of the plurality of cylindrical battery cells 110.
  • the bus bar may be in the form of a wire or plate having an electrically conductive metal.
  • the bus bar may be disposed on the upper and lower surfaces of the module case 120, and at least a portion thereof may be welded to the electrode terminals 111 and 112 of the cylindrical battery cells 110.
  • the battery pack 200 may include a heat dissipation pad 260 to help heat dissipation of the battery module 100.
  • the heat dissipation pad 260 may be located on the top or bottom surface of the battery module 100.
  • the heat dissipation pad 260 may have a material having high thermal conductivity and electrical insulation.
  • the heat radiating pad 260 may be, for example, a silicon pad provided with a silicon-based material.
  • the battery pack 200 of the present invention includes a total of 14 battery modules 100.
  • a total of 14 battery modules 100 has a structure stacked in two stages.
  • eight battery modules 100 may be fastened and coupled to each other through a bolt 230 at a first stage, and six battery modules 100 may be fastened to each other through a bolt 230 at a second stage.
  • 5 is a plan view schematically illustrating an upper case of a battery pack according to an exemplary embodiment of the present invention.
  • 6 is a bottom view schematically illustrating an upper case of a battery pack according to an exemplary embodiment of the present invention.
  • the battery pack 200 of the present invention includes a pack housing 220 having an upper case 221 and a lower case 225. .
  • the upper case 221 may be provided with an electrically insulating material.
  • the upper case 221 may include, for example, an electrically insulating plastic material.
  • the upper case 221 may be formed through injection molding.
  • the upper case 221 may have an internal structure 221e formed to cover the upper portions of the plurality of battery modules 100. That is, the internal structure 221e of the upper case 221 may have a volume capable of accommodating an upper portion of the battery module 100.
  • the upper case 221 may include a cover part 221a having an outer structure having a curved surface S as a whole from one end to the other end.
  • the upper case 221 may have a cover portion 221a configured to have nine curved surfaces S. As illustrated in FIG. In addition, the upper case 221 may be formed longer in the front-rear direction (V) than the left-right direction (W).
  • FIG. 7 is a bottom view schematically illustrating a lower case of a battery pack according to an exemplary embodiment of the present invention.
  • 8 is a plan view schematically illustrating a lower case of a battery pack according to an exemplary embodiment of the present invention.
  • the lower case 225 may include an electrically insulating material.
  • the lower case 225 may include, for example, an electrically insulating plastic material.
  • the lower case 225 may be formed through injection molding.
  • the lower case 225 may have an internal structure 225e formed to surround lower portions of the battery modules 100. That is, the internal structure 225e of the lower case 225 may have a volume capable of accommodating the lower portion of the battery module 100.
  • the lower case 225 may include a mounting part 225a having an outer structure having a curved surface from one end to the other end.
  • the lower case 225 may have a mounting portion 225a to have nine curved surfaces to the outer surface.
  • the lower case 225 may be formed longer in the front-rear direction (V) than in the left-right direction (W).
  • the upper case 221 and the lower case 225 may be coupled to each other so that the inside of the pack housing 220 can maintain a negative pressure state. That is, the lower portion of the upper case 221 and the upper portion of the lower case 225 may be tightly coupled to each other, and may be sealed from the outside. In this case, the interior in which the plurality of battery modules 100 of the pack housing 220 are accommodated may be in a relatively negative pressure state as compared with the atmospheric pressure.
  • the pack housing 220, the upper case 221 and the lower case 225 each having a cover portion 221a and a mounting portion 225a each having a curved surface on its outer structure.
  • the central portion of the upper or lower surface of the housing that is flat compared to the corner portion of the rectangular box has a structure in which negative pressure is concentrated and vulnerable to deformation force. It has a deformation
  • the pack housing 220 having a curved surface as a whole the deformation force due to the negative pressure can be evenly distributed throughout the curved surface, it is possible to effectively prevent the deformation due to the negative pressure.
  • the upper case 221 may include a first edge portion 221b formed along the bottom surface of the cover portion 221a and protruding outwardly. . That is, the first edge portion 221b may have an oval shape as a whole on a plane (bottom surface) looking upward from below. In addition, the first edge portion 221b may be formed to have a predetermined thickness in the vertical direction.
  • the lower case 225 may include a second edge portion 225b formed along the top surface of the mounting portion 225a and protruding outwardly. That is, the second edge portion 225b may have an oval shape as a whole. The second edge portion 225b may be formed to have a predetermined thickness in the vertical direction.
  • first edge portion 221b and the second edge portion 225b may be coupled to each other so that the inside of the pack housing 220 may maintain a negative pressure state.
  • the bottom surface of the first edge portion 221b and the top surface of the second edge portion 225b may be coupled to each other.
  • the first edge portion 221b and the second edge portion 225b may be bolted using, for example, bolts (FIGS. 2 and 230).
  • a fastener H1 configured to fasten the bolt may be formed in the first edge portion 221b of the upper case 221.
  • a fastening groove H2 may be formed at a position corresponding to the fastener H1 in the vertical direction on the second edge portion 225b of the lower case 225.
  • a male screw may be formed at a lower portion of the bolt 230, and a female screw may be formed at the fastening groove H2.
  • the lower portion of the bolt 230 may be bound through a screw coupling formed in the fastening groove (H2).
  • the head of the bolt 230 is set to be larger than the diameter of the fastener (H1), it can be prevented so that the head of the bolt 230 is not inserted into the fastener (H1).
  • 14 fasteners H1 may be formed at the first edge portion 221b of the upper case 221.
  • 14 fastening grooves H2 may be formed in the second edge portion 225b of the lower case 225.
  • the 14 fasteners H1 and 14 fastening grooves H2 may be formed at positions corresponding to the up and down directions.
  • the battery pack 200 of the present invention may include fourteen screw bolts 230.
  • the pack housing 220 of the present invention bolts to the fasteners H1 and the fastening grooves H2 formed in the first edge portion 221b and the second edge portion 225b.
  • sealing of the pack housing 220 can be effectively achieved.
  • the bottom surface of the first edge portion 221b having a predetermined area and the top surface of the second edge portion 225b face each other and are coupled to each other, the sealability of the pack housing 220 may be effectively increased.
  • FIG. 9 is a side cross-sectional view schematically illustrating a state cut along the line BB ′ of FIG. 1.
  • FIG. 10 is a partial side cross-sectional view schematically showing a region portion of C ′ in FIG. 9.
  • 11 is a partial side cross-sectional view which schematically shows the region part of D 'of FIG.
  • a support part 224 may be formed in the internal structure 221e of the upper case 221.
  • the support part 224 may have a structure protruding inward from an inner upper surface of the upper case 221 to support the battery module 100 accommodated in the pack housing 220.
  • the support part 224 may have a length that protrudes and extends inwardly according to a distance between an inner upper surface of the cover part 221a of the upper case 221 and an outer surface of the battery module 100.
  • the support part 224 may have a linear shape extending in the horizontal direction and may be connected to cross each other.
  • the support part 224 may have a grid shape in plan view.
  • the support 227 may also be formed in the internal structure 225e of the lower case 225.
  • the support part 227 may have a structure protruding inward from an inner bottom surface of the lower case 225 to support the battery module 100 accommodated in the pack housing 220.
  • the length of the support part 227 protruding inwardly may be different depending on the distance between the inner bottom surface of the mounting part of the lower case 225 and the battery module.
  • the support part 227 may be in a form extending linearly in the horizontal direction, it may be a form connected to cross each other.
  • the support part 227 may have a lattice shape in plan view.
  • the battery module 100 is the pack housing 220 It can be stably positioned inside.
  • the support part 224 of the upper case 221 and the support part 227 of the lower case 225 are disposed in the position corresponding to each other in a state where the plurality of battery modules 100 are interposed therebetween. Since the battery module 100 is supported, the support parts 224 and 227 may serve to prevent deformation in the inward direction of the pack housing 220 due to the negative pressure generated inside the pack housing 220. have.
  • the battery pack 200 is configured such that the upper case 221, the battery module 100, and the lower case 225 are coupled to and fixed to each other. At least one long bolt 232 may be provided.
  • a fastener H1a for inserting the long bolt 232 may be formed in the upper case 221.
  • the module case 120 of the battery module 100, the through hole (Fig. 3, H4) may be formed so that the pillar portion 232b of the long bolt 232 is inserted.
  • the lower case 225 may be formed with a fastening groove (H2a) configured to be inserted into the lower portion of the long bolt 232.
  • an insert nut 234 having a female thread coupled to the male screw of the lower part of the long bolt 232 may be inserted into the coupling groove H2a.
  • the battery pack 200 may include twelve long bolts 232.
  • the cover part 221a may be formed with twelve fasteners H1a configured to insert the pillar part 232b of the long bolt 232.
  • twelve through holes H4 configured to insert the pillar part 232b of the long bolt 232 may be formed.
  • twelve fastening grooves H2a configured to be inserted into and fixed to the lower bolt 232 may be formed.
  • an elastic ring (not shown) for sealing the fastener H1a may be formed on the bottom surface of the head 232a of the long bolt 232.
  • the elastic ring may be formed by applying a molten silicon material to a lower surface of the head 232a of the long bolt 232 and then curing the same.
  • the elastic ring may be located on the bottom surface of the head in such a manner that the elastic ring is inserted along the pillar portion 232b.
  • the battery pack 200 of the present invention at least the upper case 221, the battery module 100, and the lower case 225 is configured to be fixed to each other at least By having one or more long bolts 232, not only the binding between the upper case 221 and the lower case 225 can be stably maintained, but also the plurality of battery modules 100 accommodated in the pack housing 220. ) Can be fixed by pressing the upper case 221 and the lower case 225 in the vertical direction, thereby effectively preventing the flow of the battery module 100 inside the pack housing 220.
  • the battery pack 200 may further include a communication connector 280.
  • the communication connector 280 may be configured to be electrically connected to an external device (not shown) to check the charging state or the output state of the battery module 100.
  • the communication connector 280 may be electrically connected to the electrical component 250 through a signal transmission cable (not shown).
  • the battery pack 200 may include an external input / output terminal 290.
  • the battery pack 200 may include two external input / output terminals 290.
  • the external input / output terminal 290 may include an electrically conductive metal.
  • the external input / output terminal 290 may include aluminum, copper, nickel, or the like.
  • the external input / output terminal 290 may be electrically connected to an external bus bar 130 electrically connected to a plurality of battery cells 110 provided in the battery modules 100. Therefore, the battery pack 200 may transmit electricity through the external input / output terminal 290 to supply power to an external device.
  • the external input / output terminal 290 may be formed in a shape inserted into a part of the pack housing 220 through an insert injection method during the manufacture of the pack housing 220.
  • FIG. 12 is a partial side cross-sectional view schematically showing a portion of a battery pack according to another embodiment of the present invention.
  • the upper case 221C of the battery pack according to another embodiment may have an insert nut (H) formed on the fastener H1 formed in the cover part 221a, as compared with the upper case 221 of FIG. 9. 234 may be further inserted.
  • the battery pack according to another embodiment may include a long bolt 232B having an external thread 232s formed on the upper portion of the pillar portion 232b as compared to the long bolt 232 of FIG. 9. .
  • the insert nut 234 is provided in the fastening groove H2a of the lower case 225 and the fastener H1 of the upper case 221C. Insert nut 234 may also be provided.
  • male threads 233a may be formed at upper and lower portions of the pillar portion. Accordingly, the battery pack of FIG. 12 may be inserted and fixed to each of the insert nut 234 of the upper case 221C and the insert nut 234 of the lower case 225 using the long bolt 232B.
  • the battery pack according to another embodiment, using the long bolt 232 having a screw formed in each of the upper and lower, the inner and outer direction of the upper case 221C Since all of the movements of the can be bound, not only can the sealability of the pack housing be maintained more stably, but the pack housing can be prevented from contracting inward due to the negative pressure inside the pack housing.
  • shrinkage prevention of the pack housing can prevent the gap between the long bolt 232B and the fastener H1 from being generated, and can effectively improve the sealability of the pack housing.
  • FIG. 13 is a partially enlarged view schematically illustrating a portion of the region A ′ of FIG. 1.
  • a rib 226 may be formed in an external structure of the upper case 221. Specifically, the rib 226 may be formed to protrude from the outer surface of the cover portion 221a of the upper case 221. More specifically, the rib 226 has an outer surface (upper surface) of a portion in which a horizontal inner side is connected to an outer surface of the cover portion 221a and a lower end portion protrudes in an outer direction of the first edge portion 221b. It can be connected with.
  • the rib 226 may have a shape in which the width in the left and right directions is continuously reduced in the upper direction. That is, the rib 226 may have a triangular shape when viewed in the F direction. Further, the rib 226 may be formed in various sizes depending on the extent to which reinforcement is required at the formed portion. For example, the rib 226 located inside the upper case 221 may be larger than the rib 226 located outside. For example, as illustrated in FIG. 5, twelve ribs 226 may be formed on both sides of the upper case 221.
  • ribs 226 may be formed on the outer surface of the outer structure of the mounting part 225a of the lower case 225. Specifically, the rib 226 may be formed to protrude from the outer surface of the outer structure of the mounting portion 225a of the lower case 225. In addition, the rib 226 may have an inner side in a horizontal direction connected to an outer surface of the mounting portion 225a, and an upper end portion thereof may be connected to an outer surface (lower surface) of a portion protruding in an outer direction of the second edge portion 225b.
  • the rib 226 may have a shape in which the width in the left and right directions is continuously reduced in the lower direction. That is, the rib 226 may have an inverted triangle shape when viewed in the F direction. Further, the rib 226 may be formed in various sizes depending on the extent to which reinforcement is required at the formed portion. For example, the rib 226 located inside the lower case 225 may be larger than the rib 226 located outside. For example, as illustrated in FIG. 7, twelve ribs 226 may be formed in the lower case 225.
  • each of the upper case 221 and the lower case 225, the ribs 226 for rigid reinforcement is formed, whereby the site where the mechanical rigidity of the pack housing 220 is weak Rigidity can be compensated, effectively improving the durability of the product.
  • 14 is a rear perspective view schematically illustrating a battery pack according to an embodiment of the present invention.
  • 15 is a side cross-sectional view schematically showing a state of cutting along the line CC ′ of FIG. 14.
  • the pack housing 220 may further include a gasket 240 to seal between the upper case 221 and the lower case 225.
  • the gasket 240 may include a rubber material having elasticity or a plastic material having elasticity.
  • the gasket 240 may be interposed between the first edge portion 221b of the upper case 221 and the second edge portion 225b of the lower case 225.
  • the gasket 240 may have a shape extending continuously along the first edge portion 221b and the second edge portion 225b. That is, the gasket 240 may have an elliptical shape in plan.
  • the gasket 240 is interposed between the upper case 221 and the lower case 225, thereby sealing the sealing between the upper case 221 and the lower case 225. It can increase effectively.
  • an insertion groove H3 into which a part of the gasket 240 is inserted may be formed in each of the first edge portion 221b and the second edge portion 225b.
  • an insertion groove H3 may be formed in the first edge portion 221b to insert a lower portion of the gasket 240.
  • an insertion groove H3 may be formed in the second edge portion 225b to insert the upper portion of the gasket 240.
  • the insertion groove H3 of the first edge portion 221b and the insertion groove H3 of the second edge portion 225b may be formed at positions symmetrical in the vertical direction.
  • first edge portion 221b and the second edge portion 225b are coupled to each other, and at the same time, the gasket 240 is formed at each of the first edge portion 221b and the second edge portion 225b. It may be inserted into the insertion groove (H3).
  • the gasket 240 is the first edge portion 221b.
  • the second edge portion 225b can be stably fixed, thereby effectively preventing the gasket 240 from being separated from the pack housing 220 or being bottled or damaged.
  • a vent hole H5 may be formed in the pack housing 220.
  • the vent hole H5 may be configured to be connected to a suction hose of a vacuum pump (not shown). That is, the vent hole H5 may be configured to be connected to the suction hose of the vacuum pump to add a vacuum pressure to the inside of the pack housing 220.
  • the vacuum pump may suck internal air so that a predetermined vacuum pressure is formed in the accommodation space of the battery module 100 of the pack housing 220 through the vent hole H5.
  • a vent hole H5 may be formed at a rear end of the pack housing 220.
  • a vent hole H5 may be formed in an extension part which is connected to the second edge portion 225b of the lower case 225 of the pack housing 220 and extends in the lower direction.
  • the inside of the pack housing 220 of the battery pack 200 of the present invention can be maintained in the air discharged state by the vacuum pump, the interior of the pack housing 220
  • the oxygen may be maintained in an anaerobic state having less oxygen than the outside, and thus may prevent fire or explosion due to abnormal operation of battery cells included in the battery module 100.
  • the vent hole H5 is sealed with a stopper 258 to block inflow of external air so that the negative pressure can be stably maintained after a predetermined negative pressure is formed in the pack housing 220 relative to the air pressure of the external air.
  • the plug 258 may be provided with an O-ring (258P) to increase the sealing property of the vent hole (H5). That is, the O-ring 258P may be formed in the pillar portion 258a of the stopper 258.
  • the o-ring 258P may be made of, for example, a rubber material.
  • a hook structure 258H may be formed at one end of the pillar portion 258a in the inner direction of the stopper 258.
  • the hook structure 258H may be formed to be caught by a recessed recessed locking groove H6 formed in the internal structure of the vent hole H5.
  • the hook structure 258H is formed to seal the vent hole (H5), the stopper 258 due to the internal pressure rise or external impact of the pack housing 220 ) Can be prevented from being separated.
  • branch portion 258a of the stopper 258 may have a branched structure divided into at least two or more.
  • the pillar part 258a may be elastically inserted into the vent hole H5 through at least two split structures.
  • the stopper 258 formed with a branched structure to seal the vent hole (H5), the stopper 258 can be easily inserted and fixed to the vent hole (H5), the production The efficiency can be effectively increased.
  • the battery pack 200 may include, in addition to the battery module 100, an electric component 250 for controlling charging and discharging of the battery module 100.
  • the battery may further include a battery management system (BMS), a current sensor, a fuse box 270, and the like.
  • BMS battery management system
  • the battery pack 200 may include an assembly of the plurality of battery modules 100 and electrical components 250 required for operation thereof, as well as a cooling device for properly managing the temperature of the battery module 100, such as a heat sink and a cooling tube. Other components, such as cooling water ducts.
  • the battery pack 200 according to the present invention may be applied to an energy storage device or to an automobile such as an electric vehicle or a hybrid vehicle. That is, the vehicle according to the present invention may include the battery pack 200.
  • the device may include the battery pack 200.
  • the device may also be an energy storage device.
  • the energy storage device may be provided in an energy storage system together with a control device capable of controlling the energy storage device and a communication device communicating with the outside.
  • Battery pack 200 Battery cell: 110
  • the present invention relates to a battery pack comprising a pack housing.
  • the present invention can be used in the industry related to electronic devices or automobiles equipped with the battery pack.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un bloc-batterie comportant un boîtier de bloc à pression interne négative, permettant ainsi de prévenir l'inflammation ou l'explosion d'une cellule de batterie. Le bloc-batterie comprend : au moins un module de batterie comprenant une pluralité de cellules de batterie et une enveloppe de module, qui comporte un espace de réception formé pour recevoir la pluralité de cellules de batterie en son sein ; et un boîtier de bloc comprenant une enveloppe supérieure comportant une partie couvercle, qui présente une structure interne formée pour couvrir la partie supérieure du module de batterie et présente une structure externe ayant une surface incurvée globale allant d'une partie d'extrémité à l'autre partie d'extrémité de celle-ci, et une enveloppe inférieure comportant une partie de montage, qui présente une structure interne formée pour entourer la partie inférieure du module de batterie et présente une structure externe ayant une surface incurvée globale allant d'une partie d'extrémité à l'autre partie d'extrémité de celle-ci, l'enveloppe supérieure et l'enveloppe inférieure étant fermées hermétiquement par accouplement l'une à l'autre de manière à pouvoir maintenir la pression négative interne.
PCT/KR2019/001110 2018-04-09 2019-01-25 Bloc-batterie comportant un boîtier de bloc Ceased WO2019198919A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201980004861.8A CN111183532B (zh) 2018-04-09 2019-01-25 电池组、包括该电池组的装置及能量存储系统
ES19786077T ES2999532T3 (en) 2018-04-09 2019-01-25 Battery pack including pack housing
JP2020515254A JP7046167B2 (ja) 2018-04-09 2019-01-25 パックハウジングを含むバッテリーパック
EP19786077.8A EP3686955B1 (fr) 2018-04-09 2019-01-25 Bloc-batterie comportant un boîtier de bloc
US16/646,820 US11152662B2 (en) 2018-04-09 2019-01-25 Battery pack including pack housing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2018-0041108 2018-04-09
KR1020180041108A KR102311075B1 (ko) 2018-04-09 2018-04-09 팩 하우징을 포함하는 배터리 팩

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WO2019198919A1 true WO2019198919A1 (fr) 2019-10-17

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PCT/KR2019/001110 Ceased WO2019198919A1 (fr) 2018-04-09 2019-01-25 Bloc-batterie comportant un boîtier de bloc

Country Status (8)

Country Link
US (1) US11152662B2 (fr)
EP (1) EP3686955B1 (fr)
JP (1) JP7046167B2 (fr)
KR (1) KR102311075B1 (fr)
CN (1) CN111183532B (fr)
ES (1) ES2999532T3 (fr)
HU (1) HUE069637T2 (fr)
WO (1) WO2019198919A1 (fr)

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CN114424389A (zh) * 2020-01-03 2022-04-29 株式会社Lg新能源 具有改进的紧固结构的电池组和包括该电池组的车辆
EP4027441A4 (fr) * 2020-01-03 2023-07-12 Lg Energy Solution, Ltd. Bloc-batterie ayant une structure de fixation améliorée et véhicule le comprenant
CN114424389B (zh) * 2020-01-03 2025-08-05 株式会社Lg新能源 具有改进的紧固结构的电池组和包括该电池组的车辆
CN110828744A (zh) * 2020-01-13 2020-02-21 比亚迪股份有限公司 一种电池、电池包和电动车
CN110828744B (zh) * 2020-01-13 2020-07-10 比亚迪股份有限公司 一种电池、电池包和电动车

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EP3686955A4 (fr) 2021-03-03
KR102311075B1 (ko) 2021-10-07
JP7046167B2 (ja) 2022-04-01
CN111183532A (zh) 2020-05-19
ES2999532T3 (en) 2025-02-26
US20200280035A1 (en) 2020-09-03
KR20190118017A (ko) 2019-10-17
US11152662B2 (en) 2021-10-19
EP3686955A1 (fr) 2020-07-29
CN111183532B (zh) 2023-04-14
JP2020533773A (ja) 2020-11-19
EP3686955B1 (fr) 2024-11-27

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